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20 December, 17:22

If the sum of the interior angles in a regular polygon is 1440°, then what kind of polygon is it?

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  1. 20 December, 19:44
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    Using

    (n-2) 180 = 1440

    n-2 = 1440:180 = 8

    n = 8+2 = 10

    n = 10sides which is a decagon
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